Why is the Dudley Lab system 48 channels, when it would appear that 1000 MHz would support 50 of the 20 MHz channels?
A. Our 2 block conversion system requires 10 MHz on each side of the system center frequency for the Diplexer/Filters, which accounts for 20 MHz. The other 20 MHz is used as RF guard band: 10 MHz at the band top and 10 MHz at the band bottom. This configuration is somewhat technically conservative. However, this spectrum is not lost forever as we have plans to offer digital services in this region. For the Korean market, where there is 800 MHz allocated, we provide 40 channels on a single IF cable.
